JPS63252581A - Method for painting embossed pattern surface - Google Patents

Abstract

PURPOSE:To control a painting pattern, by applying an embossed pattern to the part becoming a decorative surface of a main material having a smooth surface by embossing processing and converting the surface thereof to three- dimensional data to control a painting mechanism. CONSTITUTION:An embossed pattern is applied to a main material 1 having a smooth surface by an embossing process A. Subsequently, the pattern and height of the embossed pattern are converted to three-dimensional data by a distance measuring and image pickup process B to be transmitted to a computer 5. In the computer processing process C, a preliminarily inputted painting pattern is collated with the three-dimensional data of the painting surface of the transferred main material 1 and said data are corrected to control a painting mechanism 6. In a painting process D, paint or ink 6a is applied to the main material 1 in tuning relation to the embossed pattern on the basis of the signal corrected by the computer processing process C.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method of applying an uneven pattern to the decorative surface of a main material having a smooth surface by embossing, and painting this uneven patterned surface with paint or ink. It is something.

[Conventional technology]

Conventionally, various decorative methods such as painting and printing have been used to add design to main materials such as thin metal plates and synthetic resin plates. However, when there are irregularities on the surface of the main material to be painted, these makeup methods have the disadvantage that makeup cannot be applied in sync with the irregularities. That is, even if a certain pattern of unevenness is applied to the main material by embossing, the embossing extends to the main material, causing distortion and causing misalignment with the paint.

[Purpose of the invention]

In order to eliminate the above-mentioned drawbacks, the present invention performs embossing and painting in succession, and uses an imaging device that recognizes the uneven pattern after embossing, focuses the image, and eliminates distortion and elongation of the main material. A rangefinder is installed to correct the coating pattern caused by waving, and the distance measurement and imaging process using the imager and rangefinder converts the surface to be painted of the main material into three-dimensional data, and this data is converted to three-dimensional data in the computer processing process. The purpose of this study is to analyze and control the painting process, and propose a painting method that synchronizes the uneven pattern and the painting pattern.

〔Example〕

The coating method according to the present invention will be explained in detail below using the drawings. FIG. 1 is a process diagram of the above-mentioned coating method, and FIG. 2 is a schematic diagram of the machine. In the figure, A is an embossing process, which is a process in which a main material 1 made of a thin metal plate, a synthetic resin plate, etc. is continuously embossed using an embossing roll 2 whose surface has an uneven pattern. Of course embossing roll 2
This is a process in which the main material 1 is held between two upper and lower rolls each having a concavo-convex pattern that interlocks with each other and pressurized, or a mechanism in which pressure is applied in a single-pressing manner can be used. B is a distance measuring/imaging step, in which the condition of the surface to be painted of the main material 1 is transferred to the computer 5 as three-dimensional data using the distance measuring device 3 and the imaging device 4. That is, the imaging device 4 is a variety of industrial cameras, and is used to transfer the uneven pattern of the main material 1 formed in the embossing process A to the computer 5, which will be described later, as two-dimensional image data.

In addition, the range finder 3 uses the imaging device 4 to focus when taking in the uneven pattern of the main material as image data, and also measures the height of the uneven pattern and the wavy state due to distortion and elongation of the main material 1. The data is transferred to the computer 5. Note that although the range finder 3 and the image pickup device 4 are shown separately in FIG. 2, they may be integrated into one unit if, for example, the distance is measured by focusing the image taken by the image pickup device 4 to make it clear. It can be done. C is a computer processing step in which the painted surface of the main material 1 is three-dimensionally analyzed based on the image data and height data transferred to the computer 5 from the ranging/imaging step B, and the coating mechanism 6 in the painting process is It is a process to control. In other words, in the computer processing step C, the uneven pattern applied in the embossing step A and the paint pattern are input in advance.
), performs comparison with the three-dimensional data of the painted surface of the main material 1 from the ranging/imaging step B, corrects distortion, elongation, etc., and controls the painting mechanism 6. D is a painting process, which mainly consists of a spray gun-like painting mechanism 6, and is a process in which the main material 1 is coated under the control of H from the computer processing process C.

In addition, in Figure 2, 'N! This conveyance mechanism consists of a belt conveyor, a roll conveyor, etc., and is used to convey the main material 1 to each process. Further, it is preferable that the range finder 3 and the image pickup device 4 be arranged immediately before the coating mechanism 6. This is to reduce misalignment of the main material 1 during transportation.

Next, a specific manufacturing example will be described. Now, in the process E of entering the coating pattern, the computer 5 displays the top surface 1a of the convex part and the bottom surface l of the concave part of the concavo-convex pattern, as shown in FIG.
It is assumed that the sloped surface 1c between b is painted unidirectionally, and that data is input so that the bottom surface 1b of the recess has a dotted pattern.

Therefore, the main material 1, which has a smooth surface as shown in FIG. 3(a), is given an uneven pattern as shown in FIG. 3(a) by embossing process A. Next, in the distance measurement/imaging process B, this concave pattern and height are converted into three-dimensional data, and the computer 5
Transfer to. Note that the range finder 3 also controls the imaging device 4 to focus in order to make the image pattern clearer. In the computer processing step C, the painting pattern as shown in FIG. The coating mechanism 6 is controlled by checking and correcting the data. In the painting process, the paint or ink 6a is applied to the main material I in accordance with the control signal corrected by the computer processing process C in synchronization with the uneven pattern as shown in FIG. Thereafter, although not shown, the main material 1 is sent to a drying, baking, or overcoating process in the same way as usual. In this way, the main material 1 can be provided with an arbitrary uneven pattern and can be painted in synchronization with this uneven pattern.

The above is an example of the coating method according to the present invention,
It is also possible to arrange a leveler 8 after the embossing step A to remove distortion caused by the embossing. Further, in the ranging/imaging process B, a light projector 9 can be arranged to keep the brightness constant.

〔Effect of the invention〕

As described above, according to the method of painting an uneven pattern surface according to the present invention, coating can be performed in synchronization with the uneven pattern applied to the main material without any deviation.

[Brief explanation of drawings]

Fig. 1 is a process diagram showing the steps of the coating method for an uneven patterned surface according to the present invention, Fig. 2 is a schematic diagram showing the outline of the machine, and Fig. 3 (
a) to (C) are explanatory diagrams illustrating the state of the main material in each step, and FIG. 4 is an explanatory diagram showing an example of a coating pattern on an uneven pattern. A... Embossing process, B... Distance measurement/imaging process,
C... Computer processing process, D... Painting process. Figure 2 Figure 3 (a), 1 Figure 10

Claims (1)

[Claims] (1) A main material with a smooth surface is embossed using an embossing roll with an uneven pattern on the surface, and then the height and pattern of the unevenness of the embossed pattern on the main material and the extension of the main material due to embossing, Converting the distortion into three-dimensional data using a range finder and an imaging device, transmitting the three-dimensional data to a computer, and controlling the painting mechanism using the pre-input painting pattern and the three-dimensional data on the computer,
A method for painting an uneven patterned surface, which is characterized by painting.